openwrt_lede/target/linux/mediatek/patches-4.4/0058-net-mediatek-unlock-on-error-in-mtk_tx_map.patch

From 6c12340c0c307d18b8d6120f64a8275b6d4d3e67 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 15 Mar 2016 10:19:04 +0300
Subject: [PATCH 058/102] net: mediatek: unlock on error in mtk_tx_map()

There was a missing unlock on the error path.

Fixes: 656e705243fd ('net-next: mediatek: add support for MT7623 ethernet')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -661,6 +661,8 @@ err_dma:
 		itxd = mtk_qdma_phys_to_virt(ring, itxd->txd2);
 	} while (itxd != txd);
 
+	spin_unlock_irqrestore(&eth->page_lock, flags);
+
 	return -ENOMEM;
 }